Telephony.



M. L. TELEPHONY, m APMCAT'ON FILED nic. |912. nENEv/En mmv lo. 1915. awnI Patented Dac. 12.1916.

4 SHEETS SHEET l libwww@ MORTONL, JOHNS@ IW. L. JOHNSON.

TELEPHONY'.

APPLICATION FILED BECA. I9I2. IIEIIEWIED MAY I0. wie.

Panw Dec. '112,191.6i 4 SHEETS-SHEET 3V MORTONL-JOHNSON.

VIII FET.,

IV. L. IOHNSN.

TELEPHONY.

v'PPLICAI'IOI FILED DEC-4, 1912. RENEWED WHW 10p i926. 4 Patenw Da. E,193.6.

A v 4 SHEETS-SHEET 4.

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sponsive device (such as an electric lamp) individual thereto so thattheoperator will immediately know which link connector has been selected.

The responsive device i). is in the form of an ordinary operatorstelephone equipment, the receiver ot which is capable o1 response tovoice currents inipressed upon the line at a calling station. As thesystem is organized, the operator will immediately he in eluded incircuit with a calling line and will take tor use the. link connector itcorresponding to the actuated signal 1, the system he ing so organizedthat hut one ot' the signals l will he selectively associated with theIcalling line at a time, the other signals remaining inert until thesignal taken for use has heen excluded trom circuit and the connectionot the operator`s telephone with the line that has caused the operationot such signal has heen hroken, mcurrences which tollow the insertion otthe plug ot thc selected link connector into the jack ot' the calledline. it such called line is idle. or in a husy hack jack (t it thedesired line is husy. 'Vlhe number ot` signals l that are individual tothe link connectors fl is suited to the, normal capacity ot the.operator and 'the operators telephone 2 is common to these signals andthe link connectors t associated therewitlrylt the normal capacity ofthe operator is exceeded the switching mechanism A will extend h`eyondits normal range ot' operation 'For the purpose of associating a signaldevice 7 with the calling line and also a recording device S and linkconnector t), which latter element may constitute an autonmticallyextended part ot the calling line hut which. as in the case ot' the linkconnectors l-. is not to he restricted to such characteristic. lf theswitch A is to respond to another calling suhscriher het'ore theconnection initiated hy the elements 7. S and tl at one position hasheen completed. then such switch will continue turther in its niovementheyond its normal range to 'associate the additional calling line` withthe elements T. S and 9 at another operators position. lach ot the lasttwo waiting contacts (or sets ot waiting contacts) ol each switch isshown as heing common to the elements T. S and E) at the differentoperators positions. these positions generally indicated at li.' (l inFig. l. The recording devices S. whether distrihuted among the regularoperators positions or located at special overflow' positions. arepret'erahly in the t'orm ot phonograph devices upon which the callingsuhscrihers may indicate the connections they desire whereatter theoperators. when reaching these recorders in the course ot their duty.will cause the same to repeat the records ims pressed thereupon hy thecalling suhscrih` ers. I do not wish to be limited, however,

to the einployment of talking devices to enahlc the equn'nnent otcalling lines` to impress records that are later to receive operatorsattention nor do I wish to he limited to the location ot the recorderoperating apparatus at the suhstations ot calling lines.

l will explain my invention more in dctail hy reference to Figs. 2 to 4.inclusive, taken collectively and in numerical order. llach suhscrihe1"sstation may he equipped with the usual `apparatus comprising a telcphoneswitch hook 1t), a call hell 1l, a condenser 12, a t'elephone receiveri3. and a telephone transmitter lll. the switch hav,ing a normal contactt'or including the serially related hell and condenser in hridge of theassociate telephone line and an alternate vcontact t'or including theserially related telephone receiver and transmitter in hridge of thetelephone line. lVhen the receiver at a calling station is removed tromits switch hook circuit is estahlished which may hc traced 'trom thegrounded hattery 15 through the upper winding' ot a line relay 1G. theupper armature switch ot' a switching relay 1T andi its normal contact.the upper armature switch ot the cutott relay 1S and its normal contact.one side of the calling suhscriher`s line, the telephone hridge at thecalling station. the other side ot they calling suhscriher`s line.thelower armature `switch ot relay 1S and its normal contact. theintermwliate armature switch o'lI relay 17 and its norlnal contact. thelower coil ot the relay lt, to ground. The lower airmature switch otrelay lt thereupon estah-y lishes a circuit traceahle trom groundthrough this armature switch and its then engaged contact. the rotarymagnet ll. the armature switch ot' sluggishly operatin;r relay )tl andits contact. tht` winding oll the relay 2t). the side switch wiper 2l.to the grounded hattery 13. 'l`he rotary magnet l!) steps wipers l and2l in a rotary step hy step movement until the wiper 2f', engages anungrounded contact whereupon the private magnet 25. whose circuit wasestahlished hy the armature switch otl the rotary magnet ll when suchrotary magnet was initially energized. has its circuit opened to movethe side switch wipers .21 and 2V to their second positions. the wiper2l in its second position opening the circuit ol" the rotary magnctlflwherehy the wipers 22. Zl and 2l remain at rest with the wiper "l uponthe contact which was previously lmgrmiiulml hut which is now groundedhy the upperarmatureswitch ot the sluggishly operating relay 2T whosecircuit was previously closed at the upper armature switch ol' relay lt.this ground com'iectionheing completed owing to the location ot thegsideswitch wiper 2V in its second position. The ground estahlished at theupper armature Lacasse the side switch wiper 21 and its secondpositioned waiting contact, the switching relay i7, to the groundedupper armature switch of the sluggishly operating relay 27 by way of theContact then engaged by this switch. When the switching relay 1.7 is'thus included in circuit sides of the calling line are extended intoconnection with the wipers 22 and 24 and through these wipers intoconnection with the talking sides of the selected link connector 3. The.circuit is also established through the test circuit controlling relay28 by way of'the upper armature switch of relay 27, the relay 28connecting the battery 15 with the thumbs of themultiple jacks 5 toprevent the calling line from being connected with another calling line.

The talking sides of the selected link circuitv 3 terminate in the tipand sleeve contacts of the calling plug 4.

Any usual or preferred cord circuit equipnient is associated with thetalking strands of the link connectors 3 and the heel strand of theplugs 4 ot such link connectors and as such llink connector equipmentforms no part of my present invention no detailed description willbeJfurnished thereof. There is, however, associated with such 4linkconnectors equipment in addition to the usual cord circuit equipmentwhich will now be described.' The relay 29 of a selected link connector'is included in bridge ot' the calling line and is consequentlyenergized, the circuit for the signal device 1 individual to theselected linkconnector being closed at the upper armature switch of' therelay 29. The intermediate armature switches oli the energized relay 29pertaining to the selected link connector established a bridge betweenthe sides of the selected link connector, which bridge includes acondenser 30, a secondary toil 31, and an operators receiver 2 at oneposition and common to the link connectors :it that position.

The operators local transmitter circuit is illustrated at 32 and has theusual primary 33 in inductive relation with the secondary 5&1. By thisarrangementthe automatically selected operators telephone equipment isin telephonie relation with the calling line so that the callingsubscriber and the automatically selected operator may converse. Theoperator having learned theconnection desired inserts the calling plug4, which is i: dividual to the signal l, in the )ack 5 of different linkconnector.

the desired line, assuming that the line has tested idle, or in the busyback jack 6 if the wanted line has tested busy.

In order to prevent an additional calling subscriber from selecting anoperators telei phone while in selected condition I provide a relay 34at each operators position common to the group of link connectorsthereat whose circuit is established at the lowermost armature switch ofrelay 29 and which relay 34 is provided with as many armature switchesas there are link connectors in the group having the relay 34. Each ofthese armature switches is grounded and is provided with a contact eachindividual to a These contacts are connected with the waiting contactspertaining to the wipers 23 in the different link selector switches A byway of the lowermost switch of the sluggishly operating relay 35, eachlink connector having such a relay 35. Vtlhen the calling plug 4 isinserted in the jack 5, or the jack 6,'a circuit, which is apparent, isestablished through the corresponding relay 35, whereupon the circuitfor the relay 29 is opened at the two upper armature switches of therelay 35 causing the signal device 1 pertaining to the selected linkconnector to be excluded from circuit and to exclude the operatorstelephone from bridge connection with the calling line. At

thesame time circuit Jfor the common relay 34 1s opened where it waspreviously closed at the bottom armature switch of the relay 29. Whenthe relay 34 is denergized its armature switches are released so thatthe various contacts thereof are ungrounded whereby the contacts for thewipers 23 corresponding to all such ungrounded contacts excepting theone individual to the selected link connector, are ungrounded, theContact corresponding to the selected link connector having previouslybeen grounded at the lower armature switch of the calling supervisoryrelay 36. Another link connector in the saine group with the linkconnector whose plug 4 has 'been inserted in a jack 5, is now subject toautomatic selection by another calling line. lf'the plug 4 has beeninserted in some jack 5 the operator will take down the connection whenthe usual supervisory signals are displayed at the calling subscriberssupervisory signal 37 and the called subscriberls supervisory signal 38.If the plug 4 has been inserted in the jack 6 the circuit of thesupervisory signal 38 is intermittently opened owing to the interrupter39 and the operator will take down the connection when the signal isdisplayed at 37. When the plug was inserted in its jack circuit t`or therelay 40 was established, the lowest armature switch oli this relayestablishing a circuit traceable trom. ground through this armatureswitch and its contact to the corresponding waiting contact izopertaining to the Wiper 23 whereby the ground at the upper armatureswitch of relay 27 is further replaced, the ground at the bottomarmature switch of the relay 40 being the only ground that remains uponthe corresponding waiting contact ot' the wiper 23 when the subscribershave replaced their telephones upon their switch hooks. ihen the plug 4is withdrawn from its engaging jack the ground at the bottoni armatureswitch of relay 40 is removed to open the circuit of the switching relay1T. rThe bottoni armature switch of relay 17 thereupon establishescircuit through the associate rclease magnet 4l and the previouslyclosed off normal switch 42 whereby the wipers 21, Q2, 23, 24 and 26arei'estored to normal.

The relay 35 is inade sluggish in actionl to prevent ground troni beingplaced upon the contact buttons ot the different switches A individualto the selected link connector in the event ot' relay 34 having beenoperated by another relay .Q9 consequent upon the initiation of anothercall by way otl another lilik connector in the same group. The linkconnector previously selected and iiicluded in connection with the jack5 or jack (3 is now subject to reselectioii upon the initiation otlanother call whether by the same calling line or another calling line.It all otl the responsive devices 2 at the different positions areiiiselccted conditionand further calls are being initiated the switchesA pertaining to the additional calling lines will continue beyond theirnormal ranges of movement to associate the calling lines with the signaldevices 7 and S and, as the invention is illustrated. each additionalcalling line is extended into connection with a link connector having acalling plug t). a i'esult which is accomplishedwhen the wiper 2-lencounters an uiigrouiided contact liutton beyond the normal range ol:the wiper 'lhis button is guarded against selection-by other linkselector switches as previously described and Jfurther description ofthis feature need not be lurnished. The. relay 2) having been energizedupon the selection ol an extra link connector having a plug Sl, theassociate magnet il is energized to attract its ariiiatui'e switch (orswitches each,individual to an extra link connector it there bey aplurality otsuchl. The lower armature switch ot the relay 2E) nowestablishes a circuit for the associate relay il which operates to guardthe selection of a selected recording device S while in selectedcondition.y as in a manner previously described in connection with thesimilar relay 34 in its guarding relation to the telephone 'l`he lowerarmature switch ot' relay 2t) also establisliesi'a circuit for the relayl.

The right hanil armature switch ot relay the contact of this switch, theright hand armature switch and contact of the relay 44, the motor 45,and the grounded battery 15. The motor 45 causes the steel tape 4G totravel in the direction indicated by the arrow, this steel tape beingcaused to travel throughout the distance of its entire length, the disk47, also driven by the motor 45 serving, when the cycle of movement ofthe tape 4.6 has been concluded, to bring an insulating portion ot' itsperiphery into engagement with the brush 48 whereby a circuit for thebattery 15 and motor 45 is opened, this circuit having previouslyincluded,

'when the disk had moved from its idle position, this motor insuch'circuit by way of the brush 48 and the metallic portion ot the diskthen engaged thereby.

Before the brush 48 engages the insulating portion ot the disk 47 thefinger 15) closes the. switch 50 inoi'nentarily thereby to close thecircuit of magnet` 44 for the purpose of opening the circuit previouslyestablished through the motor 45 so that this motor is brought to rest..-The relay 14, when encrgized, establishes a locking circuit for itselftraceable from the grounded battery 15 through the winding oli relay 44,the left hand armature switch ot this relay 44, to thelet't handgrounded armature switch ol relay 43 by way of the contact of thisswitch so that the circuit of the motor 45 is maintained open until therelay 43 is deenergized at a later period.

The steel tape '-16 passesbetween the poles presented by the sott coresot the recording magnet 51.y the reproducing magnet 52, and the recorderasing magnet 53. The recording magnet is included in a secondal orinduced circuit that, is closed by the right hand armature switch of therelay '54 when this relay is energized upon the closure of its circuitat the lett hand armature switch ot' relay 43. The erasing magnet 53 isincluded in a closed local circuit with the battery 55 at theintermediate armature switch ot' relay 54 when energized. The primarycircuit pertaining to the recording magnet 5l is closed at the lcl'thand armature switch oil relay 54 when energized. This primary circuitincludes a bridge that is established across the sides of the selectedlink connector extending to the plug il and contains the callingsubscribens telephone equipment. 'l`his bridge includes the primary coil.iti in inductive relation with the secondary coil 5T in the secondarycircuit that includes the. recording magnet 51. The calling subscribermerely speaks the inmihcr oll the desired line` the voice currents whichthe calling subscrilwr then impressed upon his line being transmitted at5l? and 5T so that they are impa'essed upon the recording magnetI 51,this magnet, in turn eil'ecting a record upon the tape 46. When the lllblt

penance i im linger 49 momentarily closes the switch 50 a circuit isestablished that includes this switch, the relay (S1 and the groundedbattery 15.

A locking circuit is established :tor the ree lay G1 by way of the llthand grounded armature switch of relay l-3, lett hand armature switchand its contact of relay il. The left hand armature switch o'li therelay (Sl thereupon closes the circuit ior the signal 7 individual tothe link connector that per tains to the selected recorder S that may becommon to a number of the extra link connectorshaving the connectingplugs i). W hen the operator is able to respond to the signal conveyedat 7 she depresses her key 62 to include her telephone set in a closedlocal s'econdary circuit that contains the secondary coil 63, theprimary'for which resides in 'the coil Gil included in the circuit withthe reproducing magnet 52. Vtlhen the key 62 is depressed the relay isincluded in circuit, the right hand armature switch of the relay 65operating to start the motor Ll5 which continues throughout the cyclecontrolled7 as before, by the disk 47, whereby the tape i6 is caused topass through its range of travel again so that the magnetic fields uponthe tape at 51 operate to induce*corresponding fields upon the magnet 52to cause voice currents in the local circuit that includes the primary6i, this local circuit having been closed at the left hand armatureswitch of relay 65. The magnet 52, like magnets 5l and. 53, hassott'iron cores upon which acs count magnet 52 is included in circuitwith the battery 66.

lWhen the recording fields upon the tape e6 are being passed intocooperation with the reproducing magnet 52 the circuit :tor the erasingmagnet 53 is opened at the right hand armature switch of the energizedrelay (5l. lWhen the key (32 is depressed its lowermost contacts closecircuit through the relay 34 associated with the link connectors 3 toprevent any such link connectors from being selected while the operatoris listening to the record olf the recording device 8. The operatorhaving heard the record, will coinplete the connection as noted upon thereeord by inserting the calling plug i) ot the selected link connectorinto the jack oit the desired line if idle, or if the line is busy byinserting such plug into the busy back jack G. ln either of which casesthe relay 29 is deenergized, the lower-most armature switch ot thisrelay opening the circuits of relays 34,

' 43 (Fig. -t) which in turn opens the circuit ot' relays i4 and 54whereby the equipment is restored to normal. Vihen a new call isinitiated the. magnet 53y operates to erase the previous record and toprepare. the tape Llli for the reception ol a new record. lil/'hen thekey h2 is operated a circuit is closed for operating il@ relay 67 toopen the circuit of the recording magnet 5l. and to close the circuit ota tone device (S8 which includesa winding @il in inductive relation tothe winding 5o, whereby the tone transmitted to the calling subscriberindicates the operator has r spondcd. There is also provided a tonedevice T0 which 'transmits a tone to the calling subscriber vf'hile Vthewipers 22, 2 and are traveling where by the calling` subscriber canascertain when an idle responsive device has been selected. rl`heabsence ot the tone indicates that the wants of' the subscriber can beexpressed without waiting for a reply from the operator. The linkconnectors ill ustrated l, 4, 9 at the bottom of' Fig fl indicate opelators position C.

ln other` applications l have shown means whereby calling subscribersmay record in formation upon phonographic receivers to. enable operatorsto receive such information `for the purpose of' establishingconnections, the claims in my present application relating specificallyto an overllow system, claims of other scope being contained in otherapplications.

While larly described. the preferred embodiment ot' the invention I donot wish to be limited to the precise details of construction andcircuit arrangement shown as changes may readily be made withoutdeparting from the spirit ot' the invention, but

Having thus described my invention li claim as new and desire to secureby Letters Patent the followingx l. il telephone exchange systemincluding telephone lines extending vtrom substations to an exchange;link connectors controlled at anuoperatos position for edcctingconnection between telephone lines;'an additional link connectorcontrolled at the aforesaid position for ellecting connection betweentelephone lines; and speech record ing and reproducing mechanism adaptedto bc associated with calling lines by equipment ot said additional linkconnector and operable by telephonie current impressed at a callingstation upon the calling telephone line to record the callingsubscribers speech and. operable 'to convey the recorded speech to theoperator at said position.-

2. n. telephone exchange system including telephone lines extending fromsubstations to an exchange; link connectors controlled at an operatoi"sposition for effecting connection between telephone lines; speechrecording and reprmlucing mechanism; and a conuector having equipmentfor associating this mechanism. with a calling line, said mechanismbeing operable by telephonie current impressed at a calling station uponthe calli ing telephone line to record the calling' sub- Y scribei"sspeech and operable to convey the -\,corded speech to the operator atsaid. posi tion.

l have herein shown and particu-y lll-lll Cil 3. A telephone exchangesystem` including telephone lines extending from substations to anexchange; link connectors controlled at an operators positiontoirelt'ecting connection between telephone dinos; automaticallyoperating switching mechanismi'for connecting these link connectorsAwith calling line; and speech recordin aiid reproducing mechanismadapted to be associated with calling lilies b v said additional linkcoilnector and operable by telephonie current impressed at a callillgstation upon the calling telepllolie line to record the callingsubscribers speech and operable to convey the recorded speech to theoperator at said position. N

4. A telephone exchailge system including` telephone lines extendingfrom substations to an exchange; link connectors controlled at anoperators position for etfectillg connection between telephone lines;speech recording and reproducing. mechanism; a com nector havingequipment for associating, this mechanism, with a calling line, saidmechanism being operable by telephonie current impressed at a callillgstation upon the calling telephone line to record the callingsubscribers speech alid operable to convey the recorded speech to theoperator at said position; .and automatically operating switchingmechanism for connecting said connectors with calling lines.

5. A telephone exchange systeln including telephone lines extending fromsubstations to an exchange where operators responsive devices arelocated; link connectors controlled at an operator"s position toretfecting connection betweeli telephone lilies; operator responsivedevice selector switches for associating operator responsive devicesfree for selection with calling lines throughout theA normal i'ange ofoperation of such selector switches: and recording devices uadapted tobe associated with calling lilies b v selector switches when operatedbeyond their normal ranges lot opei'ation.

6. vA telepholle exchange system including telephone lilies extendingtrom substations to an exchange where operators responsive devices arelecated; link connectors coiltrolled at all operator`s position t'orefl'ecting connection between telephone lilies; operator responsivedevice selector switches for associating operator responsive devicesfree for selection with calling lines throughout the normal range ot'operation of sich selector switches; and speech recording andreprodlicing mechanism adapted to be associated with calling lines bythe selector switches when operating beyond their normal rallges ofoperation and operable by telephonie current imi'iressed at a callingstation upon the calling telepliolie-lilie to record the callingsul'iscribcrs speech and operable to convey the recorded speech to anattendant operator.

i calling lines by equipment ot said additional link connector andincluding a recording magnet operable by teleplloilic currentillipressed at a calling station upon the calling lille; a reproducingmagnet adapted for telephonie relation with the oilerators telephone;alld a recording element operated upon bythe recording magnet andoperating upon the reproducing magnet.

S. teleplloile exchange sys'em including telephone lilies extending Errii-substations to all exchange; link connectors controlled at anoperators position for effecting connection between telephone lines;speech recordilig alid reproducing mechanism; a connector havingequipment for associating this mechanism with a calling line, saidmechailism includinga recording magnet operable by teleplloliic currentimpressed at a calling station upon the calling line; a reproducingmagnet adapted for telephonie relation with the operators telephone; anda recording element operated upon by the recording magnet and operatingupon the reproducing magnet. ll t). A telephone exchange systemincluding telephone lines extending from substations to ali exchange;link connectors controlled at all operators position for effectingconnection between teleplloile lines; automatically operating switchingmechanism for connecting tllese link connectors with calling lilies; alladditional link connector; speech recording alld reproducing mechanismadapted to be associated with calling lilies by said additional linkconnector and including a recording magnet operable by telepholliccurrent illlpressed ata calling station upon the calling line; a`reproducing magnet adapted for telepliollic relation with the operator`stelephone; and a recording elelneilt operated upoll by the recordingmagnet arid operating upon the reproducing magnet.

10., A telepllone exchange syst-em includinfr telephone lines extendingtroni substations to all` exchange; link connectors controlled at allo,pcl'atoi"s position l'or etl'ecting conl'lcetion between telephonelilies; speech recording and reproducing ll/lechanislll; a connectorhaving equipment for associating this` mechanism with a calling line,said lllecllaliisin including a recording magnet operable by telephoniecurrent impressed at a calliilg station upon the calling lille; areproducing magnet adapted i'or teleplioilic relation with the opcratorstelephone; a recording element operated upon by the recording mag* netand operating upon the reproducing magnet; and auton'iatically operatingswitching mechanism for connecting said link connectors with callinglines.

l1. A telephone exchange system including telephone lines extending fromsubstations to an exchange where operators7 responsive devices arelocated; link connectors controlled at an operators-position foreiiccting connection between telephone lines; operator responsive deviceselector switches for associating operator responsive devices free forselection with calling lines throughout the normal range of operation ofsuch selector switches; speech recording and reproducing mechanismadapted to be associated with calling lines by the selector switchesWhen operating beyond their normal ranges of operation and including arecording magnet operable by telephonie current impressed at a, callingstation upon the calling line; a reproducing magnet provided withequipment for effecting telephonie relation with the operzitorstelephone; and a recording element operated upon by the recording magnetand operating upon the reproducing magnet.

In witness whereof, I hereunto subscribe my naine this twenty-seventhday of N0- vember A. D., 1912.

lVitnesses E. L. WHITE, G. L. CRAGG.

